Benford's Law.

"So according to Benford's law, accounting statements are getting less and less representative of what's really going on inside of companies.
The major reform that was passed after Enron and other major accounting standards barely made a dent.

While these time series don't prove anything decisively, deviations from Benford's law are compellingly correlated with known financial crises, bubbles, and fraud waves.
And overall, the picture looks grim.